Yamaha YZ450F 2008 Manuel D'atelier Du Proprietaire page 32

Part to be tightened
Drive sprocket
Drive chain sprocket cover
Shift pedal
Shift guide
Stopper lever
Segment
*1: Tighten the cylinder head bolts to 30 Nm (3.0 m • kg, 22 ft • lb) in the proper tightening sequence, remove and retighten
the cylinder head bolts to 20 Nm (2.0 m • kg, 14 ft • lb) in the proper tightening sequence, and then tighten the cylinder head
bolts further to reach the specified angle 180° in the proper tightening sequence.
CHASSIS
△
- marked portion shall be checked for torque tightening after break-in or before each race.
Part to be tightened
△
Upper bracket and outer tube
△
Lower bracket and outer tube
△
Upper bracket and steering stem
△
Handlebar upper holder
△
Handlebar lower holder
△
Steering ring nut
Front fork and damper assembly
Front fork and adjuster
Damper assembly and base valve
Adjuster and damper assembly
Bleed screw (front fork) and base valve
△
Front fork and front fork protector
△
Front fork protector and brake hose holder
Throttle grip cap
Clutch lever holder
Clutch lever mounting nut
Hot starter lever holder
△
Front brake master cylinder and bracket
Front brake master cylinder cap
Brake lever mounting bolt
Brake lever mounting nut
Brake lever position locknut
△
Cable guide (front brake hose) and under bracket
△
Front brake hose union bolt (brake master cylinder)
△
Front brake hose union bolt (brake caliper)
△
Front brake caliper and front fork
△
Brake caliper (front and rear) and pad pin plug
△
Brake caliper (front and rear) and pad pin
△
Brake caliper (front and rear) and bleed screw
TIGHTENING TORQUES
Thread size Q'ty
M20 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M8 × 1.25
Thread size Q'ty
M8 × 1.25
M8 × 1.25
M24 × 1.0
M8 × 1.25
M10 × 1.25
M28 × 1.0
M51 × 1.5
M22 × 1.25
M42 × 1.5
M12 × 1.25
M5 × 0.8
M6 × 1.0
M6 × 1.0
M5 × 0.8
M5 × 0.8
M6 × 1.0
M5 × 0.8
M6 × 1.0
M4 × 0.7
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M10 × 1.25
M10 × 1.25
M8 × 1.25
M10 × 1.0
M10 × 1.0
M8 × 1.25
2-12
Tightening torque
Nm m•kg
1 75 7.5
2 8 0.8
1 12 1.2
2 10 1.0
1 10 1.0
1 30 3.0
Tightening torque
Nm m•kg
4 21 2.1
4 21 2.1
1 145 14.5
4 28 2.8
2 34 3.4
1 Refer to NOTE.
2 30 3.0
2 55 5.5
2 29 2.9
2 29 2.9
2 1 0.1
6 5 0.5
2 7 0.7
2 4 0.4
2 4 0.4
1 4 0.4
2 4 0.4
2 9 0.9
2 2 0.2
1 6 0.6
1 6 0.6
1 5 0.5
1 4 0.4
1 30 3.0
1 30 3.0
2 28 2.8
2 3 0.3
2 18 1.8
2 6 0.6
ft•lb
54
5.8
8.7
7.2
7.2
22
ft•lb
15
15
105
20
24
22
40
21
21
0.7
3.6
5.1
2.9
2.9
2.9
2.9
6.5
1.4
4.3
4.3
3.6
2.9
22
22
20
2.2
13
4.3